The second picture in #6. Proofed for smokeless (Nitro), using 15 grams of powder and a Steel Jacketed Bullet (Stahl Mantel Geschoss)
The bird over the Crown-over-U looks like the final black powder proof.
The more I look, the confuseder I get.
The height of the cross on the crowns looks East German, 1950 to 1992, Suhl proofhouse.
Everything else appears to be 1891 to 1939.
Look at #10 on this page. Crown over W - choked barrel.
Then the 6th one in the second table here. Also crown over W. Also choked barrel. The height of the cross.
I'm pretty sure it's German.
Meddle not in the affairs of dragons, for thou art crunchy, and taste good with catsup - George of Lod, Year of Our Lord 297
I always take precautions.
Beware the Evil Bullet Fairies.